SpringerLink (Online service), DeWalle, D. R., Hom, J. L., & Adams, M. B. The Fernow watershed acidification study.
Lua i Stíl Chicago (17ú heag.)SpringerLink (Online service), David R. DeWalle, John L. Hom, agus Mary Beth Adams. The Fernow Watershed Acidification Study.
Lua MLA (8ú heag.)SpringerLink (Online service), et al. The Fernow Watershed Acidification Study.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.